Question

我的表单上有一个允许拖放的面板。我已将代码写入DragEnter和DragDrop事件，上次检查时它们工作正常。但是现在当我在面板上拖动一个文件时，我得到禁用的光标并且事件不再被触发。我查看了整个项目，看看我是否在某个地方禁用了AllowDrop，但我没有。

以下是我的活动以及他们正在执行的活动：

this.pnlNoPostbagFolder.AllowDrop = true;

this.pnlNoPostbagFolder.DragDrop += new System.Windows.Forms.DragEventHandler(this.pnlNoPostbagFolder_DragDrop);
this.pnlNoPostbagFolder.DragEnter += new System.Windows.Forms.DragEventHandler(this.pnlNoPostbagFolder_DragEnter);

private void pnlNoPostbagFolder_DragDrop(object sender, DragEventArgs e)
{
    FileListDragDrop(sender, e);
}

private void pnlNoPostbagFolder_DragEnter(object sender, DragEventArgs e)
{
    FileListDragEnter(sender, e);
}

private void FileListDragEnter(object sender, DragEventArgs e)
{
    if (e.Data.GetDataPresent(DataFormats.FileDrop))
        e.Effect = DragDropEffects.Copy;
    else
        e.Effect = DragDropEffects.None;
}

private void FileListDragDrop(object sender, DragEventArgs e)
{
    string[] s = (string[])e.Data.GetData(DataFormats.FileDrop, false);
    for (int i = 0; i < s.Length; i++)
    {
        if (Path.GetExtension(s[i]).Equals(".csv", StringComparison.InvariantCultureIgnoreCase) || Path.GetExtension(s[i]).Equals(".sql", StringComparison.InvariantCultureIgnoreCase))
        {
            string source = s[i];
            string destination = Common.Conf.PostbagFolderLocation + "\\" + Path.GetFileName(s[i]);
            if (File.Exists(destination))
            {
                DialogResult dr = MsgBox.Show(string.Format("A file named '{0}' already exists in the Postbag folder. Overwrite?", Path.GetFileName(s[i])), "File Exists", MsgBox.Buttons.YesNo, MsgBox.Icon.Question);
                if (dr == DialogResult.Yes)
                {
                    File.Copy(source, destination, true);
                    RefreshPostbagFolder();
                }

            }
            File.Copy(source, destination, true);
        }
        else
            MsgBox.Show("File extension not supported", "Add File", MsgBox.Buttons.OK, MsgBox.Icon.Error);
    }
}

Answer 1

您的所有代码似乎都没问题，我的机器中的代码也没有任何问题，这似乎是UAC问题：

即使AllowDrop设置为true，也会在面板上拖放禁止

1 个答案: